摘要
为揭示锅炉水冷壁壁面附近H_(2)S浓度与CO、H_(2)等还原性气氛浓度的关联关系,在某300 MW等级高温腐蚀锅炉上进行了水冷壁多组分气氛同步测试试验。结果发现:当CO体积分数在3.5%~13%时,CO浓度与H_(2)S、H_(2)浓度均存在较强的正相关性,CO浓度与CO_(2)浓度存在较强的负相关性。另外,CO浓度与H_(2)S浓度的正相关性与测点位置有关,随着炉膛高度增加,二者的正相关性逐渐减弱。在还原性气氛中,除了CO以外,还观察到大量H_(2),最大H_(2)体积分数为4.7%。H_(2)S浓度与H_(2)浓度也存在较强的正相关性。最后,根据同步试验结果,分别给出了CO浓度与H_(2)S、H_(2)浓度的关联关系式,可供运行调整人员参考。
In order to reveal the correlation between H_(2)S concentration and the concentration of CO,H_(2)and other reducing atmosphere near the water wall of the boiler,a multicomponent synchronous test of reducing atmosphere adjacent to water wall was carried out on a 300 MW high temperature corrosion boiler.It is found that when CO volume fraction is between 3.5%and 13%,there is a strong positive correlation between CO concentration and H_(2)S,H_(2)concentration.The correlation is negative between CO concentration and CO_(2)concentration.In addition,the positive correlation between CO concentration and H_(2)S concentration is related to the location of the measuring point.With the increase of furnace height,the positive correlation between the two gradually decreases.In the reducing atmosphere,in addition to CO,a large amount of H_(2)is also observed,with the maximum H_(2)volume fraction of 4.7%.There is also a strong positive correlation between H_(2)S concentration and H_(2)concentration.Finally,according to the results of synchronous test,the correlation equations between CO concentration and H_(2)S,H_(2)concentration were given respectively,which could be used as a reference for operators.
作者
熊小鹤
陈发林
阮仁晖
谭厚章
李延森
XIONG Xiaohe;CHEN Falin;RUAN Renhui;TAN Houzhang;LI Yansen(MOE Key Laboratory of Thermo-Fluid Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi Province,China;Xi’an Green Electric Power Technology Co.,Ltd.,Xi’an 710000,Shaanxi Province,China)
出处
《发电技术》
CSCD
2023年第6期800-808,共9页
Power Generation Technology
基金
国家自然科学青年基金项目(22008192)。
关键词
锅炉
高温腐蚀
低氮改造
还原性气氛
水冷壁
boiler
high temperature corrosion
low-NOx retrofit
reducing atmosphere
water wall
